<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>类样式的叠加</title>
		<style>
		.c3{
					 background-color: blueviolet;
					 font-size:30px;
		}
		 .c1{
			 font-size: 100px;
		 }
		 .c2{
			 color: red;
			 font-size:10px;
		 }
		 
		</style>
	</head>
	<body>
		<div class="c2 c3 c1">
			鸿星尔克，to be No 1
		</div>
	</body>
</html>
